BTR 5 (Multi 2020)

Each single BTR run in a “conventional” BTR session is started by the input manual tuning procedure for a specific scenario, which is next followed by the code restart. This input routine required the User's extensive efforts and time to get the final result for multiple operation scenarios. Recent modifications in BTR-5 code engine and I/O have made it possible to run automatically multi-parametric scans of different scenarios by a single click, with a preset list of scenarios input records. This reduces much of the User’s handwork, and makes the total design routine shorter and more efficient (including the post-processing efforts). NBI geometry input has become more flexible, allowing the User to choose between the “standard” NBI geometry (PDP - compatible) and free-surfaces input. Memory optimization in BTR-5 allows independent tracking of each sort of particles - to obtain the optimum statistics for maps calculation, with no limits (in earlier versions the maximum was ~10000 particles per beamlet). Power maps resolution in BTR-5 (unsmoothed 2D profiles) on average is higher than in BTR-4, due to the increased number of model particles of each sort, the standard cell for each surface is varied between 1mm and 1cm depending on the specific surface dimensions.

BTR v5 upgrades (Nov 2018 - Aug 2020)

BTR contract 2018-2020

Purpose of upgrade: multi-scenarios, multi-task running approach

Model, Config structure, parallel operation

• Plasma model >> more simple: av. sigma + param. profiles (no input files - more User friendly!)

• Beam stopping and ionization >> real THICK model (not axial beam decay, as before)

• Beam - plasma module is finally benchmarked

• Duct surfs >> ON-OFF in standard Config

• Close Surfaces >> small distance resolutions within a track step

• Multi-Thread model >> totally dynamic (old - static) >> threads restart

• Engine: workers restart, synchronization, results aggregation

• Multi-Scen / Multi-Run operation based on Scen-Param input

• Macro-commands (in Scen-Param) can be processed

• 3 total Runs per each Scen (atoms, resid, reion opts)

• Individual splits, bml optics and other settings for each run opt (Config)

• Log-file >> terminal + autosave

• Load Maps >> Static ("new" but also very old)

• Power balance between runs, loads normalization

Input

• MF/Gas auto download from paths in Config

• Add Surf - file/folder path in Config (autodetected)

• Add Surf auto Update (on F2)

• AS diagnostics: Surf clones excluded, invalid corners

• Scen-Param format (Macros, Scen Options / param)

• Default Mesh resolution before total start

Output

• Falls stats and opts

• Output folders Tree

• 2 load Formats (3/6col) for Scen results

• Scen loads All-Runs summary

• Scen Report

• All Scens Summary

• CSV format (Excel picked)

Most important New BTR features: model and UI

Model: multi-task settings, run options (e.g. diff splits through runs)

Model: plasma module, beam ionization maps, shine-through refined maps

Model: Static surfaces (~250, including transparent, ITER NBI), resolution > 100x100

Input: Scenario file with parameters and Macro-commands

Output: folders tree, Reports (TXT, CSV format), summary through all Scenarios, etc.

Safety and Control: Terminal screen, Log-file